Molecular formula
C21H18N4O
123 compounds have this formula on CompoundList.
- Molar mass
- 342.40g/mol
- Monoisotopic mass
- 342.1481Da
- Atoms
- 44
- Elements
- 4
- Rings plus double bonds
- 15
The formula C21H18N4O describes a molecule made of 21 carbon atoms, 18 hydrogen atoms, 4 nitrogen atoms and 1 oxygen atom. It is written in Hill notation: carbon first, then hydrogen, then the other elements in alphabetical order. The formula tells you which atoms are present, not how they are connected, which is why several different chemicals can share it.
Elemental composition
- C Carbon × 2173.67%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 185.30%1.008 × 18 = 18.144 g/mol
- N Nitrogen × 416.36%14.007 × 4 = 56.028 g/mol
- O Oxygen × 14.67%15.999 × 1 = 15.999 g/mol
Look up another formula
Compounds with the formula C21H18N4O
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 100 of 123 compounds
![(4E)-5-Methyl-4-[[(2-methylquinolin-8-yl)amino]methylidene]-2-phenylpyrazol-3-one chemical structure, C21H18N4O, CAS 796878-42-7](/s/OKVVSJSJFPXEJA-UHFFFAOYSA-N.svg)
(4E)-5-Methyl-4-[[(2-methylquinolin-8-yl)amino]methylidene]-2-phenylpyrazol-3-one
CAS 796878-42-7C21H18N4O
![6-Amino-3-methyl-1-phenyl-4-(p-tolyl)-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile chemical structure, C21H18N4O, CAS 53316-59-9](/s/LDHHDFFSJYOKLK-UHFFFAOYSA-N.svg)
6-Amino-3-methyl-1-phenyl-4-(p-tolyl)-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile
CAS 53316-59-9C21H18N4O
2-Amino-5-oxo-1-PH-4-(3-pyridinyl)-1,4,5,6,7,8-hexahydro-3-quinolinecarbonitrile
CAS 339336-44-6C21H18N4O
![6-Amino-1-benzyl-3-methyl-4-phenyl-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile chemical structure, C21H18N4O, CAS 333778-68-0](/s/XWZAWPMDEPDHEE-UHFFFAOYSA-N.svg)
6-Amino-1-benzyl-3-methyl-4-phenyl-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile
CAS 333778-68-0C21H18N4O
4-(4-Morpholinyl)-2,6-diphenyl-5-pyrimidinecarbonitrile
CAS 746-67-8C21H18N4O
![2-Methyl-7-[pyridin-3-yl-(pyridin-2-ylamino)methyl]quinolin-8-ol chemical structure, C21H18N4O, CAS 353519-27-4](/s/OFMIIQLTLSPRQI-UHFFFAOYSA-N.svg)
2-Methyl-7-[pyridin-3-yl-(pyridin-2-ylamino)methyl]quinolin-8-ol
CAS 353519-27-4C21H18N4O
![2,7-Dimethyl-N,3-diphenylpyrazolo[1,5-a]pyrimidine-6-carboxamide chemical structure, C21H18N4O, CAS 578002-58-1](/s/PDHSYNHJTRLCHU-UHFFFAOYSA-N.svg)
2,7-Dimethyl-N,3-diphenylpyrazolo[1,5-a]pyrimidine-6-carboxamide
CAS 578002-58-1C21H18N4O
![2,5-Dimethyl-N,3-diphenylpyrazolo[1,5-a]pyrimidine-6-carboxamide chemical structure, C21H18N4O, CAS 774561-16-9](/s/BOYNXPGAJNXHJS-UHFFFAOYSA-N.svg)
2,5-Dimethyl-N,3-diphenylpyrazolo[1,5-a]pyrimidine-6-carboxamide
CAS 774561-16-9C21H18N4O
![6-Amino-3-phenyl-4-(1-phenylethyl)-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile chemical structure, C21H18N4O, CAS 6033-83-6](/s/IAIFBENZKXFKGB-UHFFFAOYSA-N.svg)
6-Amino-3-phenyl-4-(1-phenylethyl)-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile
CAS 6033-83-6C21H18N4O
![1-(4-Ethoxyanilino)-3-methylpyrido[1,2-a]benzimidazole-4-carbonitrile chemical structure, C21H18N4O, CAS 305334-69-4](/s/YKUYQKRBIUMLHU-UHFFFAOYSA-N.svg)
1-(4-Ethoxyanilino)-3-methylpyrido[1,2-a]benzimidazole-4-carbonitrile
CAS 305334-69-4C21H18N4O
![7-[[(6-Methylpyridin-2-yl)amino]-pyridin-4-ylmethyl]quinolin-8-ol chemical structure, C21H18N4O, CAS 353790-28-0](/s/STROMGIFIYNBGS-UHFFFAOYSA-N.svg)
7-[[(6-Methylpyridin-2-yl)amino]-pyridin-4-ylmethyl]quinolin-8-ol
CAS 353790-28-0C21H18N4O
![7-[[(4-Methylpyridin-2-yl)amino]-pyridin-4-ylmethyl]quinolin-8-ol chemical structure, C21H18N4O, CAS 426247-57-6](/s/TVPUVEWTDLBXFX-UHFFFAOYSA-N.svg)
7-[[(4-Methylpyridin-2-yl)amino]-pyridin-4-ylmethyl]quinolin-8-ol
CAS 426247-57-6C21H18N4O
Urea, 1-(p-(9-acridinylamino)phenyl)-3-methyl-
CAS 63178-31-4C21H18N4O
![2-[2-(3,5-Dimethyl-1H-pyrazol-1-yl)-6-phenyl-4-pyrimidinyl]phenol chemical structure, C21H18N4O, CAS 303098-09-1](/s/MJZPVJAZGCSQSL-UHFFFAOYSA-N.svg)
2-[2-(3,5-Dimethyl-1H-pyrazol-1-yl)-6-phenyl-4-pyrimidinyl]phenol
CAS 303098-09-1C21H18N4O
N-(6-Methyl-2-phenyl-2H-1,2,3-benzotriazol-5-yl)-2-phenylacetamide
CAS 432010-22-5C21H18N4O
![N-(3-(Imidazo[1,2-a]pyrimidin-2-yl)phenyl)-2-(m-tolyl)acetamide chemical structure, C21H18N4O, CAS 862810-05-7](/s/BLSZJJZKJSBATH-UHFFFAOYSA-N.svg)
N-(3-(Imidazo[1,2-a]pyrimidin-2-yl)phenyl)-2-(m-tolyl)acetamide
CAS 862810-05-7C21H18N4O
![N-(4-(Imidazo[1,2-a]pyrimidin-2-yl)phenyl)-3,5-dimethylbenzamide chemical structure, C21H18N4O, CAS 862811-17-4](/s/AQLSLJAUEXOJPV-UHFFFAOYSA-N.svg)
N-(4-(Imidazo[1,2-a]pyrimidin-2-yl)phenyl)-3,5-dimethylbenzamide
CAS 862811-17-4C21H18N4O
3,4-Dimethyl-N-(2-phenyl-2H-1,2,3-benzotriazol-5-yl)benzamide
CAS 364596-48-5C21H18N4O
![N-(5-(Imidazo[1,2-a]pyrimidin-2-yl)-2-methylphenyl)-2-phenylacetamide chemical structure, C21H18N4O, CAS 862810-45-5](/s/QEYVJUYSXLYSHZ-UHFFFAOYSA-N.svg)
N-(5-(Imidazo[1,2-a]pyrimidin-2-yl)-2-methylphenyl)-2-phenylacetamide
CAS 862810-45-5C21H18N4O
![N-Benzyl-2-(2-(pyridin-2-yl)-1H-benzo[d]imidazol-1-yl)acetamide chemical structure, C21H18N4O, CAS 708995-12-4](/s/IDVHTCVTDGBGEL-UHFFFAOYSA-N.svg)
N-Benzyl-2-(2-(pyridin-2-yl)-1H-benzo[d]imidazol-1-yl)acetamide
CAS 708995-12-4C21H18N4O
![1-(1H-Benzo[d][1,2,3]triazol-1-yl)-3-(9H-carbazol-9-yl)propan-2-ol chemical structure, C21H18N4O, CAS 307340-41-6](/s/RLRSSTDKZZQAGJ-UHFFFAOYSA-N.svg)
1-(1H-Benzo[d][1,2,3]triazol-1-yl)-3-(9H-carbazol-9-yl)propan-2-ol
CAS 307340-41-6C21H18N4O
1-(1H-Benzimidazol-2-yl)-3-methyl-6-phenyl-1,5,6,7-tetrahydro-4H-indazol-4-one
CAS 924864-47-1C21H18N4O
![(Z)-2-Cyano-3-[3-(4-ethylphenyl)-1-phenylpyrazol-4-yl]prop-2-enamide chemical structure, C21H18N4O, CAS 371776-28-2](/s/JLARFDGQEHCHEZ-ATVHPVEESA-N.svg)
(Z)-2-Cyano-3-[3-(4-ethylphenyl)-1-phenylpyrazol-4-yl]prop-2-enamide
CAS 371776-28-2C21H18N4O
![2-Methyl-N-(3-(3-methylimidazo[1,2-a]pyrimidin-2-yl)phenyl)benzamide chemical structure, C21H18N4O, CAS 862811-59-4](/s/CJKDPQASEWGSLU-UHFFFAOYSA-N.svg)
2-Methyl-N-(3-(3-methylimidazo[1,2-a]pyrimidin-2-yl)phenyl)benzamide
CAS 862811-59-4C21H18N4O
- Pyridazino(4,3-c)isoquinoline, 6-morpholino-3-phenyl-96825-85-3C21H18N4O
- Pyridazino(4,3-c)isoquinoline, 6-(1-azetidinyl)-3-(p-methoxyphenyl)-96825-89-7C21H18N4O
- 2-(2-(Pyridin-4-yl)-1H-benzo[d]imidazol-1-yl)-N-(o-tolyl)acetamide1105215-58-4C21H18N4O
- 1 suppliersBi-1870041303515-32-3C21H18N4O
- N-Methyl-N-phenyl-2-(2-(2-pyridyl)benzimidazolyl)acetamide939242-35-0C21H18N4O
- 2-(2-(Pyridin-2-yl)-1H-benzo[d]imidazol-1-yl)-N-(o-tolyl)acetamide1105240-29-6C21H18N4O
- 1-(3-Methoxyanilino)-4-(4-pyridylmethyl)phthalazine212141-60-1C21H18N4O
- N-(4-Ethoxyphenyl)-2-pyridin-3-ylquinazolin-4-amine385391-43-5C21H18N4O
- 6,9-Diphenyl-5,6,7,9-tetrahydro[1,2,4]triazolo[5,1-b]quinazolin-8(4H)-one727393-99-9C21H18N4O
- (4,6-Dimethylpyrimidin-2-yl)(2-oxo-1,2-diphenylethyl)cyanamide524057-44-1C21H18N4O
- N-[2-(4-Methylphenyl)imidazo[1,2-a]pyrimidin-3-yl]-2-phenylacetamide863587-86-4C21H18N4O
- 1-(1H-Benzimidazol-2-yl)-6-(3-methylphenyl)-1,5,6,7-tetrahydro-4H-indazol-4-one924875-95-6C21H18N4O
- 5-Methyl-2-[4-(4-methylphenyl)-6-phenylpyrimidin-2-yl]-2,4-dihydro-3H-pyrazol-3-one5215-62-3C21H18N4O
- 7-Methoxy-4-(2-(pyridin-2-yl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl)quinoline476474-40-5C21H18N4O
- 1-Phenyl-N-(2-(pyridin-4-yl)ethyl)-1H-benzo[d]imidazole-5-carboxamide1203420-01-2C21H18N4O
- 6-Amino-4-(2-methylphenyl)-3-(4-methylphenyl)-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile667404-53-7C21H18N4O
- Pyridine, 3-(4-(4-methylphenyl)-5-(phenoxymethyl)-4H-1,2,4-triazol-3-yl)-141078-96-8C21H18N4O
- Pyridine, 4-(4-(4-methylphenyl)-5-(phenoxymethyl)-4H-1,2,4-triazol-3-yl)-141078-97-9C21H18N4O
- N-[1-(1H-1,2,3-Benzotriazol-1-yl)-2-phenylethyl]benzamide134004-81-2C21H18N4O
- 2,7-Dimethyl-N'-(1-naphthylmethylene)imidazo[1,2-a]pyridine-3-carbohydrazide331423-07-5C21H18N4O
- N-(5-Imidazo[1,2-a]pyrimidin-2-yl-2-methylphenyl)-2-methylbenzamide847387-74-0C21H18N4O
- 5-Cinnamyl-1-(p-tolyl)-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one863446-26-8C21H18N4O
- 1-(1H-Benzimidazol-2-yl)-6-(4-methylphenyl)-1,5,6,7-tetrahydro-4H-indazol-4-one924856-92-8C21H18N4O
- 3-Cyclopropyl-1-(4-phenoxyphenyl)-imidazo[1,5-a]pyrazin-8-ylamine1196386-95-4C21H18N4O
- N-{1-[(4-Methylphenyl)methyl]-1,2-dihydropyridin-2-ylidene}-1H-indazole-3-carboxamide1223877-09-5C21H18N4O
- 1-(4-(1H-Benzo[d]imidazol-2-yl)phenyl)-3-(p-tolyl)urea1235066-47-3C21H18N4O
- 1-Benzhydryl-3-(pyrazolo[1,5-a]pyridin-5-yl)urea2034548-78-0C21H18N4O
- N-(1,1-Dimethyl-2-propynyl)-4-phenyl-2-(3-pyridinyl)-5-pyrimidinecarboxamide400079-55-2C21H18N4O
- 2,7-Dimethyl-N-[(Z)-naphthalen-1-ylmethylideneamino]imidazo[1,2-a]pyridine-3-carboxamide5575-24-6C21H18N4O
- N-(5-{Imidazo[1,2-a]pyrimidin-2-yl}-2-methylphenyl)-4-methylbenzamide847387-76-2C21H18N4O
- 1-(1H-Indol-3-yl)-3-(4-(phenylamino)phenyl)urea899947-04-7C21H18N4O
- N-[2-(1H-Imidazol-5-yl)ethyl]-2-phenylquinoline-4-carboxamide951969-12-3C21H18N4O
- 6-Amino-4-(4-benzyloxyanilino)quinazoline179247-04-2C21H18N4O
- (S)-N-(1-(1H-Benzo[d]imidazol-2-yl)-2-phenylethyl)picolinamide1212109-05-1C21H18N4O
- 4-((1H-Imidazol-1-yl)methyl)-N-(2-methylquinolin-5-yl)benzamide1226455-17-9C21H18N4O
- N-[1-(1H-Benzimidazol-2-yl)-2-phenylethyl]pyridine-2-carboxamide1325433-93-9C21H18N4O
- 2-Phenyl-2-(1H-pyrrol-1-yl)-1-{2,5,7-triazatricyclo[6.4.0.0^{2,6}]dodeca-1(8),6,9,11-tetraen-5-yl}ethan-1-one1257546-28-3C21H18N4O
- 2-(Pyridin-4-yl)-N-[2-(1H-pyrrol-1-yl)ethyl]quinoline-4-carboxamide1324097-79-1C21H18N4O
- 2-(Pyridin-3-yl)-N-[2-(1H-pyrrol-1-yl)ethyl]quinoline-4-carboxamide1324062-40-9C21H18N4O
- (2-Methyl-8,9-dihydropyrazolo[1,5-a]pyrido[3,4-e]pyrimidin-7(6H)-yl)(naphthalen-1-yl)methanone1704639-57-5C21H18N4O
- 1-[6-[1-(6-Ethyl-2-pyridinyl)-1H-indazol-6-yl]-2-pyridinyl]ethanone1864772-32-6C21H18N4O
- 3-[4-(1-Methyl-1H-pyrazol-4-yl)-1,2,3,4-tetrahydroisoquinoline-2-carbonyl]benzonitrile2034533-89-4C21H18N4O
- 4-[2-(6-Methyl-2-pyridinyl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl]quinolin-6-ol2426547-83-1C21H18N4O
- N-(1H-1,2,3-Benzotriazol-1-ylmethyl)-N-benzylbenzamide681446-63-9C21H18N4O
- N-(3-{Imidazo[1,2-A]pyrimidin-2-YL}phenyl)-3,5-dimethylbenzamide863020-08-0C21H18N4O
- N-(3-(Imidazo[1,2-a]pyrimidin-2-yl)phenyl)-3-phenylpropanamide847387-62-6C21H18N4O
- N-(5-{Imidazo[1,2-a]pyrimidin-2-yl}-2-methylphenyl)-3-methylbenzamide847387-75-1C21H18N4O
- 3-Methyl-N-(3-(3-methylimidazo[1,2-a]pyrimidin-2-yl)phenyl)benzamide862811-60-7C21H18N4O
- 5-Cinnamyl-1-(o-tolyl)-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one895008-32-9C21H18N4O
- N-[2-([1,2,4]Triazolo[4,3-a]pyridin-3-yl)ethyl]biphenyl-4-carboxamide883469-02-1C21H18N4O
- 1,3-Bis-(2-methyl-quinolin-4-yl)urea676447-55-5C21H18N4O
- 4-Methyl-N-(3-(3-methylimidazo[1,2-a]pyrimidin-2-yl)phenyl)benzamide862811-61-8C21H18N4O
- (2-Trityl-2H-tetrazol-5-yl)-methanol916344-33-7C21H18N4O
- 2-(Pyridin-2-yl)-N-[2-(1H-pyrrol-1-yl)ethyl]quinoline-4-carboxamide1324061-04-2C21H18N4O
- N-([2,3'-Bipyridin]-4-ylmethyl)-3-(4-cyanophenyl)propanamide2034440-36-1C21H18N4O
- N-([2,3'-Bipyridin]-4-ylmethyl)-2-(1H-indol-1-yl)acetamide2034267-98-4C21H18N4O
- N-([2,3'-Bipyridin]-3-ylmethyl)-2-(1H-indol-1-yl)acetamide2034441-09-1C21H18N4O
- N-([2,3'-Bipyridin]-3-ylmethyl)-2-(1H-indol-3-yl)acetamide2034563-23-8C21H18N4O
- N-({[2,3'-Bipyridine]-3-yl}methyl)-3-(4-cyanophenyl)propanamide1904294-44-5C21H18N4O
- N-[4-[(4-Amino-1-naphthalenyl)oxy]-2-pyridinyl]-2-pyridinemethanamine1630206-55-1C21H18N4O
- N-((6-(1-Methyl-1H-pyrazol-4-yl)pyridin-3-yl)methyl)-1-naphthamide2034608-68-7C21H18N4O
- N-([3,3'-Bipyridin]-5-ylmethyl)-3-(4-cyanophenyl)propanamide2310039-83-7C21H18N4O
- N-([3,3'-Bipyridin]-5-ylmethyl)-2-(1H-indol-3-yl)acetamide2185590-78-5C21H18N4O
- (4-Anilino-1-ethyl-1H-pyrazolo[3,4-b]pyridin-5-yl)(phenyl)methanone39973-62-1C21H18N4O
- 8-Ethoxy-2,3-diphenylpyrido[2,3-b]pyrazin-6-amine16336-04-2C21H18N4O
- Acetamide, N-[4-(9-acridinylamino)phenyl]-2-amino-83209-86-3C21H18N4O
- Propanamide, N-[2-[2-(2-pyridinyl)phenyl]-1H-benzimidazol-5-yl]-824395-07-5C21H18N4O
- N-(2-Aminophenyl)-4-[(2H-indazol-2-yl)methyl]benzamide920314-26-7C21H18N4O
- (1-Trityl-1H-tetrazol-5-yl)-methanol916343-57-2C21H18N4O
- 4-[1,4-Dihydro-6-(4-morpholinyl)indeno[1,2-c]pyrazol-3-yl]benzonitrile760995-22-0C21H18N4O
- (E)-2-Cyano-N-(4-ethylphenyl)-3-(1-phenylpyrazol-3-yl)prop-2-enamide1445771-22-1C21H18N4O
- 3-(3-(4-(Pyridin-3-ylmethyl)benzyl)isoxazol-5-yl)pyridin-2-amine2342605-52-9C21H18N4O
- Pyrimidine, 4-([1,1'-biphenyl]-4-yloxy)-6-(3,5-dimethyl-1H-pyrazol-1-yl)-413620-31-2C21H18N4O
- 2-Cyano-3-[4-(dimethylamino)phenyl]-N-(quinolin-5-yl)prop-2-enamide735297-55-9C21H18N4O
- Phenol, 2-(5-((4-methylphenyl)amino)-4-phenyl-4H-1,2,4-triazol-3-yl)-82619-91-8C21H18N4O
- 2-([1,1'-Biphenyl]-4-ylamino)-8-ethylpyrido[2,3-d]pyrimidin-7(8H)-one211245-10-2C21H18N4O
Frequently asked questions
What is the molar mass of C21H18N4O?
The molar mass of C21H18N4O is 342.40 g/mol, calculated from standard atomic weights for 21 carbon atoms, 18 hydrogen atoms, 4 nitrogen atoms and 1 oxygen atom. The monoisotopic mass is 342.1481 Da.
How many compounds have the formula C21H18N4O?
CompoundList lists 123 compounds with the molecular formula C21H18N4O, including (4E)-5-Methyl-4-[[(2-methylquinolin-8-yl)amino]methylidene]-2-phenylpyrazol-3-one, 6-Amino-3-methyl-1-phenyl-4-(p-tolyl)-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile, 2-Amino-5-oxo-1-PH-4-(3-pyridinyl)-1,4,5,6,7,8-hexahydro-3-quinolinecarbonitrile. Compounds that share a formula are isomers. They contain the same atoms arranged differently, so their properties, uses and prices can be very different.
What is the degree of unsaturation of C21H18N4O?
C21H18N4O has a degree of unsaturation of 15. That is the total number of rings and pi bonds (a double bond counts as one, a triple bond as two) in any structure with this formula.